TWI634725B - Rotor for a motor - Google Patents

Abstract

A motor rotor is used to solve the problems of poor shock absorption effect of a conventional motor rotor. The motor rotor of the present invention comprises: a rotating shaft; an elastic collar coupled to the outer circumference of the rotating shaft; a permanent magnet disposed on an outer circumference of the elastic collar; and two sets of connecting members, each of the connecting members is provided with a through hole for the The rotating shaft is disposed, and the two sets of joints are respectively coupled to the elastic collar and the axial ends of the permanent magnet, but the two sets of joints do not contact the rotating shaft.

Description

Motor rotor

The present invention relates to a motor rotor, and more particularly to a motor rotor for an inner rotor motor.

Early use of the motor rotor of the inner rotor motor directly binds the magnetic member to the rotating shaft, or the magnetic member is clamped to the rotating shaft through the key block, so that the rotating shaft and the magnetic member can rotate synchronously. Embodiments similar to the conventional motor rotor described above have been disclosed in the Patent Cases No. I572125 and Publication No. 200744290 of the Republic of China.

However, the combination of the magnetic member and the rotating shaft is easy to cause the fragmentation of the magnetic member; and the combination of the key blocks makes it difficult to ensure the stable coupling of the magnetic member and the rotating shaft, so the conventional motor rotor often causes the motor to run poorly. , causing problems such as poor running performance and noise.

To this end, please refer to FIG. 1 , which is another conventional motor rotor 9 having a rotating shaft 91 , a magnetic member 92 and two fixing seats 93 . The magnetic member 92 is inserted through a shaft hole 921 for the shaft 91 to pass through, so that the magnetic member 92 is slightly tightly coupled or loosely coupled to the shaft 91. The two fixing seats 93 are respectively tightly coupled with the shaft 91. The two fixing seats 93 clamp the magnetic member 92 to a predetermined portion on the rotating shaft 91. An embodiment similar to the conventional motor rotor 9 has been disclosed in the Patent No. I389423 of the Republic of China.

The above-mentioned motor rotor 9 can effectively prevent the magnetic member 92 from being broken, and can simultaneously fix the magnetic member 92 to a predetermined portion on the rotating shaft 91; however, the motor rotor 9 is transported. In this case, the magnetic member 92 excited by the motor stator drives the rotating shaft 91 to rotate at a high speed and generates vibration, thereby transmitting the vibration to the two fixing bases 93, and then transmitting the vibration to the rotating shaft closely contacting the two fixing bases 93. 91, causing vibration when the whole motor is in operation, not only will cause operational noise, but also cause problems such as unsatisfactory operation and reduced service life of the motor.

In view of this, the conventional motor rotor does have the need to improve.

In order to solve the above problems, the present invention provides a motor rotor which can effectively reduce the vibration transmitted to the rotating shaft when the motor is running.

The following directionality or its similar terms, such as "before", "after", "upper (top)", "lower", "inside", "outside", "side", etc. The directionality or the singularity of the present invention is intended to be illustrative only and not to limit the invention.

The motor rotor of the present invention comprises: a rotating shaft; an elastic collar, the elastic collar is coupled to the outer circumference of the rotating shaft; a permanent magnet, the permanent magnet is disposed on the outer circumference of the elastic collar; and two sets of joints, each of the The assembly is provided with a through hole for the shaft to be inserted, and the two sets of joints are respectively coupled to the elastic collar and the axial ends of the permanent magnet, but the two sets of joints do not contact the rotating shaft.

Accordingly, the motor rotor of the present invention can provide shock absorbing or shock absorbing effects by the elastic collar coupled to the rotating shaft, and can stably fix the elastic collar and the permanent by the two sets of connectors not contacting the rotating shaft. The magnet does not transmit the vibration to the rotating shaft, so the vibration transmitted to the rotating shaft during the running of the motor can be greatly reduced, and the operation of the motor can be made smoother, thereby improving the running performance of the motor, reducing the operating noise and prolonging the service life of the motor. .

Wherein, the two sets of joints respectively press the permanent magnet to more stably position the permanent magnet, and have the effects of improving the bonding stability and the like.

Wherein, the maximum outer diameter of each of the set of members is smaller than the maximum outer diameter of the permanent magnet, so as to avoid the impact of the motor rotor on the motor stator when the rotor is rotated, and the lifting motor has a lifting motor The life of the child and other effects.

Wherein, the elastic collar is provided with a shaft hole through which the rotating shaft is coupled, and the inner diameter of the shaft hole is smaller than the outer diameter of the rotating shaft; thus, the elastic collar can be elastically deformed and attached to the circumferential surface of the rotating shaft to effectively Absorbing the vibration transmitted to the elastic collar, so that the vibration is not easily transmitted to the rotating shaft, and has the effects of improving the smooth running of the rotor of the motor.

Wherein, the rotating shaft is provided with a limiting portion on the circumferential surface of the ring for the elastic collar to be ejected; thus, the utility model has the functions of improving the combination stability of the rotating shaft and the elastic collar, and the assembly convenience of the motor rotor.

The elastic collar is made of rubber or silicone material to have better shock absorption and shock absorption effects.

Wherein, the two axial outer peripheral edges of the permanent magnet form a guiding portion, and the outer periphery of each of the connecting members forms a fastening portion, and the fastening portion clamps the guiding portion; thus, the two sets of connectors can be More stable positioning of the permanent magnet has the effect of improving the bonding stability.

Wherein, the motor rotor may further comprise a magnetic ring, and the magnetic sealing ring is coupled between the elastic collar and the permanent magnet to improve the performance of the motor.

Wherein, the two sets of connectors resist the magnetic sealing ring to more stably locate the magnetic sealing ring, and have the effects of improving the bonding stability and the like.

Wherein, the elastic collar is provided with a plurality of through holes, each of the connecting members is provided with a plurality of positioning holes, and the plurality of positioning holes are respectively axially opposite to the corresponding through holes for a fixing component to be coupled; The simple structure firmly combines the elastic collar and the two sets of connectors, and has the effects of improving assembly efficiency and the like.

Wherein, the fixing component is a screw, and the positioning hole of the set of the connecting member at one end of the elastic collar is a screw hole, and the fixing component screw-locks the screw hole; thus, the utility model has the effects of improving assembly efficiency and the like.

Wherein, the axial two-end integral injection molding of the elastic collar is combined with several snails Each of the sets of the connecting members is provided with a plurality of positioning holes, and the plurality of fixing elements respectively lock the corresponding positioning holes and nuts; thus, the utility model has the effects of improving assembly efficiency and the like.

Wherein, the two sets of joints are bonded to the axial ends of the elastic collar; thus, the utility model has the effects of improving assembly efficiency and the like.

The two ends of the elastic collar are respectively provided with a positioning convex portion, and the two sets of the connecting members respectively are sleeved by the two positioning protrusions, thereby ensuring that the two groups can be assembled when the two sets of connectors are assembled. The connecting members are respectively accurately positioned at predetermined positions on the axial ends of the elastic collar, and ensure that the two sets of joints do not contact the rotating shaft; thus, the assembly efficiency can be improved and the elastic collar can be shock-absorbing and shock-absorbing to the rotating shaft. Effects and other effects.

The two axial end faces of the permanent magnet are respectively provided with at least one first engaging portion, and the two sets of connecting members are respectively provided with at least one second engaging portion on one of the axial end faces, and the two sets of connecting members are respectively The at least one second engaging portion is engaged with the corresponding first engaging portion; thus, the joint stability between the two sets of the connecting member and the permanent magnet can be improved, and the positioning hole and the through hole can be quickly aligned to achieve the lifting. Assembly convenience and efficiency.

Wherein, the first engaging portion of the permanent magnet and the second engaging portion of the set of the connecting member are U-shaped grooves, and the other is a U-shaped convex block for quick alignment in the axial direction; thus, Improve the convenience and efficiency of assembly.

Among them, the permanent magnet is a highly anisotropic magnet; thus, the structure of the motor rotor can be simplified, and the assembly convenience can be improved.

Wherein, each of the set of connectors is provided with a weight groove on an axial end surface farther away from the elastic collar for placing the weight member; thus, the rotation stability of the motor rotor can be improved.

Wherein, the outer peripheral surface of each of the sets of components is provided with a plurality of weight grooves for placing the weight members; thus, the rotation stability of the motor rotor can be improved.

Wherein, the two sets of connectors can be made of materials such as copper, aluminum or non-magnetic steel; thus, the effect of avoiding affecting the magnetic permeability can be improved, and the magnetic stability of the rotor of the motor can be improved.

〔this invention〕

1‧‧‧ shaft

11‧‧‧Limited

2‧‧‧Flexible collar

21‧‧‧Axis hole

22‧‧‧through holes

23‧‧‧ positioning convex

3‧‧‧ permanent magnet

31‧‧‧ lead corner

32‧‧‧First engagement department

4a, 4b, 4c, 4d, 4e‧‧‧ joints

41‧‧‧Perforation

42‧‧‧Positioning holes

43‧‧‧Weighing trough

44‧‧‧Card Department

45‧‧‧Second engagement department

5‧‧‧Fixed components

6‧‧‧ nuts

7‧‧‧Magnetic ring

D1, D3‧‧‧ inside diameter

D2‧‧‧ OD

D4, D5‧‧‧ maximum outer diameter

G‧‧‧ gap

W‧‧‧weight parts

[Use]

9‧‧‧Motor rotor

91‧‧‧ shaft

92‧‧‧Magnetic parts

921‧‧‧Axis hole

93‧‧‧ Fixed seat

Figure 1: Schematic diagram of a conventional motor rotor.

Fig. 2 is a perspective view showing the exploded structure of the first embodiment of the present invention.

Fig. 3 is a schematic sectional view showing the structure of the first embodiment of the present invention.

Figure 4 is a schematic cross-sectional view showing another embodiment of the present invention.

Fig. 5 is a schematic sectional view showing the structure of a second embodiment of the present invention.

Figure 6 is a schematic cross-sectional view showing the structure of a third embodiment of the present invention.

Figure 7 is a schematic cross-sectional view showing the structure of a fourth embodiment of the present invention.

Fig. 8 is a perspective exploded perspective view showing a fifth embodiment of the present invention.

The above and other objects, features, and advantages of the present invention will become more apparent from the aspects of the appended claims. The first embodiment of the motor rotor of the present invention comprises a rotating shaft 1, an elastic collar 2, a permanent magnet 3 and two sets of connecting members 4a. The elastic collar 2 and the permanent magnet 3 are respectively disposed on the rotating shaft. The outer circumference of 1 is sandwiched by the two sets of connectors 4a.

The motor rotor of the present invention is mainly used for an inner rotor motor, the rotating shaft 1 is rotatably assembled to a motor base, and when the inner rotor motor is in operation, the motor rotor can rotate relative to the motor base with the rotating shaft 1 as an axis .

The elastic collar 2 is coupled to the outer circumference of the rotating shaft 1 . In the embodiment, the elastic collar 2 is attached to the circumferential surface of the rotating shaft 1 , and the elastic collar 2 can be made of an elastic material such as rubber or silicone. The elastic collar 2 can be provided with a shaft hole 21 for the shaft 1 to be coupled; preferably, the inner diameter D1 of the shaft hole 21 is smaller than the outer diameter D2 of the shaft 1 before assembly, so that the elasticity is assembled. The collar 2 can be elastically deformed to adhere to the circumferential surface of the rotating shaft 1 after assembly, so that the vibration transmitted to the elastic collar 2 can be effectively absorbed, so that the vibration is not easily transmitted to the rotating shaft. 1.

Alternatively, in other embodiments, the elastic collar 2 can also be integrally molded and integrated with the rotating shaft 1. Preferably, referring to FIG. 4 , the rotating shaft 1 can be provided with a limiting portion 11 on the circumferential surface thereof for the elastic collar 2 to be coated to improve the bonding stability of the rotating shaft 1 and the elastic collar 2 . And the ease of assembly of the motor rotor. For example, but not limited to, the limiting portion 11 may be a ring groove provided on the circumferential surface of the rotating shaft 1 , embossed or roughened, or the cross section of the limiting portion 11 may be non-circular. The form of the invention is not limited.

Referring to FIGS. 2 and 3 again, the permanent magnet 3 is disposed on the outer circumference of the elastic collar 2 for sensitizing the motor stator; the permanent magnet 3 may be in the form of a ring magnet or arranged in a ring shape. The magnets are composed of a plurality of magnets, and the present invention is not limited thereto. Preferably, the permanent magnet 3 is made of a highly anisotropic magnet, so that the motor rotor does not need to separately provide an element for sealing the permanent magnet 3, which helps to simplify the structure of the motor rotor and improve assembly convenience.

Each of the sets of connectors 4a is provided with a through hole 41 through which the rotary shaft 1 can pass. The two sets of joints 4a are respectively coupled to the elastic collar 2 and the axial ends of the permanent magnet 3, but the two sets of joints 4a do not contact the rotating shaft 1, so that the elastic collar 2 and the permanent magnet 3 can It is stably restrained between the two sets of connectors 4a. In other words, the inner diameter D3 of the through hole 41 of each of the sets of the joints 4a is larger than the outer diameter D2 of the rotating shaft 1, so that a gap G is formed between each of the set of joints 4a and the rotating shaft 1, so that the set of joints 4a When the through hole 41 is sleeved to the rotating shaft 1, each of the connecting members 4a can not contact the rotating shaft 1 to improve the assembly smoothness; more importantly, the two sets of connecting members can be ensured when the motor rotor is operated. 4a cannot transmit vibration to the shaft 1. Moreover, the maximum outer diameter D4 of each of the sets of joints 4a may be smaller than the maximum outer diameter D5 of the permanent magnets 3, so as to prevent the motor stator from being struck by the set of joints 4a when the motor rotor rotates.

In addition, the two sets of connectors 4a preferably respectively press the permanent magnets 3 to enhance the stable fixing effect of the permanent magnets 3, and the present invention does not limit the combination of the two sets of the joints 4a and the elastic collars 2 In this embodiment, the elastic collar 2 can be provided with several axial through runs. The plurality of positioning holes 42 are respectively disposed in the hole 22, and the plurality of positioning holes 42 are axially opposed to the corresponding through holes 22, so that a fixing member 5 is pierced and coupled. For example, the fixing member 5 can be selected as a long type screw, and the set of connecting members 4a at one end of the elastic collar 2 can be configured as a screw hole for the fixing member 5 to be screwed and locked. Or, the positioning holes 42 of the two sets of the connecting members 4a are all simple through holes, and a long type screw and a nut are selected as the fixing member 5, so that the tail end of the long type screw can be worn out. The positioning hole 42 is coupled to the nut. Other different combinations of the two sets of connectors 4a and the elastic collar 2 will be described in detail later.

Moreover, the two sets of the joints 4a can be made of metal such as copper, aluminum or non-magnetic steel to avoid affecting the magnetic permeability and stabilize the magnetic force of the rotor of the motor. Each of the sets of joints 4a can also be provided with a plurality of weight grooves 43 at an axial end face farther away from the elastic collar 2 for placing the weight members W, so that the motor rotor can have better rotational stability.

According to the foregoing structure, the motor rotor of the present invention is coupled to the rotating shaft 1 by the elastic collar 2, so that the rotating shaft 1 of the hard material is separated from the permanent magnet 3, and by not contacting the rotating shaft 1 The two sets of connectors 4a are stably fixed to the elastic collar 2 and the permanent magnet 3, so that the elastic collar 2 can provide shock absorption or shock absorption effects, and also ensure that the vibration is not caused by the two sets of connectors 4a. The motor rotor of the present invention can greatly reduce the vibration transmitted to the rotating shaft 1 during the operation of the motor, thereby making the operation of the motor smoother, improving the running performance of the motor, reducing the operating noise and prolonging the service life of the motor.

Referring to FIG. 5, which is a second embodiment of the motor rotor of the present invention, the second embodiment of the present invention is substantially the same as the first embodiment described above, and the main difference is that the two sets of joints 4b and the elastic collar 2 The combination type.

In detail, in this embodiment, a plurality of nuts 6 can be integrally formed by injection molding at the two ends of the elastic collar 2, and each of the connecting members 4b is provided with a plurality of positioning holes 42, each of which is respectively disposed on The two ends of the elastic collar 2 are opposite to each other, and the positioning holes 42 are opposite to the corresponding nuts 6. The plurality of fixing elements 5 respectively lock the corresponding positioning holes 42 and the nuts 6, thereby forming the two groups. The connector 4b is firmly coupled to the axial ends of the elastic collar 2.

In addition, the motor rotor preferably includes a magnetic ring 7 made of a magnetically permeable material, and the magnetic sealing ring 7 is coupled between the elastic collar 2 and the permanent magnet 3 to lift the motor. efficacy. The magnetic sealing ring 7 is preferably also pressed by the two sets of connectors 4 to more stably position the magnetic sealing ring 7.

Referring to FIG. 6, in the third embodiment of the motor rotor of the present invention, the two sets of joints 4c may be bonded to the axial ends of the elastic collar 2 in an adhesive manner. It is to be noted that, in this embodiment, a positioning convex portion 23 is further disposed at the two axial ends of the elastic collar 2, and the two connecting members 4c are respectively sleeved by the through holes 41 to the two positioning convex portions 23, Therefore, when the two sets of connectors 4c are assembled, the two sets of the joints 4c can be accurately positioned at predetermined positions on the axial ends of the elastic collar 2, respectively, and the two sets of joints 4c are not contacted with the rotating shaft 1 In this way, the assembly efficiency of the motor rotor can be improved, and the shock absorbing and shock absorbing effect of the elastic collar 2 on the rotating shaft 1 can be improved.

Referring to FIG. 7, which is a fourth embodiment of the motor rotor of the present invention, the fourth embodiment of the present invention is substantially the same as the first embodiment described above, and the main difference is that the two sets of joints 4d and the permanent magnets 3 are external. The type of the edge.

In detail, in this embodiment, a guiding portion 31 can be formed on the outer circumferential edge of the permanent magnet 3, and the outer periphery of each of the connecting members 4d forms a locking portion 44; the fastening portion 44 can be, for example, The outer peripheral edge of each of the sets of the joints 4d is formed by bending the permanent magnets 3, or a structure of a bump or the like which is protruded from the end faces of the permanent magnets 3 by the respective sets of the joints 4d, so as to be constituted by the retaining portions 44. The pliers are fastened to the lead portion 31 so that the two sets of the joints 4d can position the permanent magnet 3 more stably.

Referring to FIG. 8, which is a fifth embodiment of the motor rotor of the present invention, the fifth embodiment of the present invention is substantially the same as the first embodiment described above, and the main difference is that the present embodiment is in the permanent magnet 3 The axial end faces are respectively provided with at least one first engaging portion 32, and the two connecting members 4e are respectively provided with at least one second engaging portion 45 on one of the axial end faces, so that the two sets of the connecting members 4e can be respectively The at least one second engaging portion 45 is engaged with the corresponding first engaging portion 32, thereby lifting the two The combination stability between the assembly 4e and the permanent magnet 3, and at the same time, helps to quickly position the plurality of positioning holes 42 of each of the sets of the joints 4e with the plurality of through holes 22 of the elastic collar 2, In order to lock the fixing component 5, the assembly convenience and efficiency are improved.

The first engaging portion 32 of the permanent magnet 3 and the second engaging portion 45 of the connecting member 4e may be in a matching configuration, for example, one is a U-shaped groove, and the other is a U-shaped convex block. In order to quickly combine the alignment from the axial direction.

On the other hand, in this embodiment, a plurality of weight grooves 43 may be disposed on the outer peripheral surface of each of the sets of joints 4e for placing the weight members W, so that the motor rotor can have better rotational stability.

In summary, the motor rotor of the present invention, the motor rotor of the present invention can provide shock absorbing or shock absorbing effects by an elastic collar coupled to the rotating shaft, and is stabilized by the two sets of connectors that do not contact the rotating shaft. The elastic collar and the permanent magnet are positioned, and the vibration is not transmitted to the rotating shaft, so that the vibration transmitted to the rotating shaft during the running of the motor can be greatly reduced, and the operation of the motor can be made smoother, thereby improving the running performance of the motor and reducing the operation. Noise and extended motor life.

While the invention has been described in connection with the preferred embodiments described above, it is not intended to limit the scope of the invention. The technical scope of the invention is protected, and therefore the scope of the invention is defined by the scope of the appended claims.

Claims (20)

a motor rotor comprising: a rotating shaft; an elastic collar, the elastic collar is coupled to the outer circumference of the rotating shaft; a permanent magnet, the permanent magnet is disposed on an outer circumference of the elastic collar; and two sets of joints, each of the assembled The member is provided with a through hole for the shaft to be pierced, and the two sets of joints are respectively coupled to the elastic collar and the axial ends of the permanent magnet, but the two sets of joints do not contact the rotating shaft. The motor rotor of claim 1, wherein the two sets of joints respectively press the permanent magnet. The motor rotor of claim 1, wherein a maximum outer diameter of each of the sets of components is less than a maximum outer diameter of the permanent magnet. The motor rotor of claim 1, wherein the elastic collar is provided with a shaft hole for the shaft to be coupled, and the inner diameter of the shaft hole is smaller than the outer diameter of the shaft. The motor rotor according to claim 1, wherein the rotating shaft is provided with a limiting portion on a circumferential surface thereof for the elastic collar to be ejected. The motor rotor according to any one of claims 1 to 5, wherein the elastic collar is made of a rubber or silicone material. The motor rotor according to any one of claims 1 to 5, wherein the outer circumferential edge of the permanent magnet forms a lead portion, and the outer periphery of each of the sets forms a fastening portion. The fastening portion clamps the guide portion. The motor rotor according to any one of claims 1 to 5, further comprising a magnetic ring, the magnetic sealing ring being coupled between the elastic collar and the permanent magnet. The motor rotor of claim 8, wherein the two sets of connectors press against the magnetic seal ring. The motor rotor according to any one of claims 1 to 5, wherein the elastic sleeve The ring is provided with a plurality of through holes, and each of the connecting members is provided with a plurality of positioning holes, and the plurality of positioning holes are respectively axially opposed to the corresponding through holes for a fixing component to be coupled. The motor rotor of claim 10, wherein the fixing component is a screw, and the positioning hole of the set of the connecting member at one end of the elastic collar is a screw hole, and the fixing component screw-locks the screw hole. The motor rotor according to any one of claims 1 to 5, wherein the axial two-end integral injection molding of the elastic collar is combined with a plurality of nuts, and each of the sets of the plurality of positioning holes is provided with a plurality of positioning holes. The fixing elements respectively lock the corresponding positioning holes and nuts. The motor rotor according to any one of claims 1 to 5, wherein the two sets of joints are bonded to the axial ends of the elastic collar. The motor rotor of claim 13, wherein the two ends of the elastic collar are respectively provided with a positioning convex portion, and the two sets of joints are respectively pierced by the two positioning protrusions. The motor rotor of claim 1, wherein the two axial end faces of the permanent magnet are respectively provided with at least one first engaging portion, and the two sets of the connecting members are respectively provided with at least one of the axial end faces. The second engaging portion is configured to engage the corresponding first engaging portion by the at least one second engaging portion. The motor rotor of claim 15, wherein the first engaging portion of the permanent magnet and the second engaging portion of the set of the connecting member are U-shaped grooves, and the other is U-shaped convex. Piece. The motor rotor according to any one of claims 1 to 5, wherein the permanent magnet is a highly anisotropic magnet. The motor rotor according to any one of claims 1 to 5, wherein each of the set of members is provided with a weight groove at an axial end face farther from the elastic collar. The motor rotor according to any one of claims 1 to 5, wherein the outer peripheral surface of each of the sets of the joints is provided with a plurality of weight grooves. The motor rotor according to any one of claims 1 to 5, wherein the two sets are connected Parts are made of copper, aluminum or non-magnetic steel.